Safety attachivient for elevators



(No Model.) 1

E. O. L. KUNNEGKE 2 Sheets. Sheet 2.

SAFETY ATTAGEMENT FOR ELEVATORS.

Patented Dec. 18. 1883.

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ERNST O. L. KUNNEGKE, OF DAYTON, OHIO.

SAFETY ATTACHMENT FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 290,331, dated December 18, 1883,

Application filed August 29, 1883. (No model.)

To a-ZZ whom it may concern Be it known that I, ERNST C. L. KUNNEOKE, of Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Safety Attachments for Hotel and other Elevators; and I do hereby declare the following to be a full, clear, and exact description of the same.

My invention has for its object to provide an improved safety attachment for elevators; and it consists in the novel construction and combinations of parts, which I will first describe, and then point out particularly in the claims at the end of the specification.

In the accompanying drawings, Figure 1 represents an elevation of an elevator provided with my safety attachment, said attachment being in normal position out of action. Fig. 2 is a similar View, showing the suspensioncable broken and the safety attachment in action supporting the elevator. Fig. 3 is a top view of the device as represented in Fig. 1. Fig. 4 is a detail view, showing a portion of the upright guides. the racks, and the gripping devices. Fig. 5 is a View of the counterweights and their guides.

Similar letters of reference in the several figures denote the same parts.

Letter A indicates the elevator-car; B B B B, the timbers or uprights constituting the guides for the elevator, and extending from top to bottom of the elevator-shaft. Two of such timbers B B are arranged on each side of the elevator-shaft, with a space, 0, intervening between them and extending from top to bottom of the elevator-shaft. I

To the upper part of the car at D D, at oppo-v site sides, are pivoted two levers, E E, the outer ends of which extend through the space between the vertical timbers B B, and carry projections or studs F F, which are adapted to be thrown into or out of engagement with racks G G, located on the outside of timbers B B, and extending from top to bottom thereof, as shown. The inner end of each of the levers E E has articulated to it a bar, H, which, in turn, is articulated to another bar, I, pivoted at i to a support, J, on the car,'and connected at its outer end to a rope or cable, K, which passes over sheaves or pulleys L L, and has suspended to its other enda counter-weight, M.

The suspension-cable N is secured to a suspending-beam, 0, located between the roof of the car and the levers E E, as shown. Normally the draft upon the suspendingcable beam 0 causes it to bear upwardly upon the levers E E and cause them and their connected parts to assume the positions shown in Fig. 1, with the lugs thrown outward out of engagement with the rack. The suspending-bar O, itwill be observed, is formed angularly on its upper surface, so as to conform to and fit the angle formed by the inclined under surfaces of the bars E E, and be caused thereby to always assume a central position.

Under ordinary circumstances the various parts of the safety contrivance remain in the position in which they are shown in Fig. 1. \Vhen, however, the suspensioncable N becomes broken or its tension slackens so as to release the suspension-bar O, the latter drops upon the roof of the car, as shown in Fig. 2, and the levers E E, through the instrumentality of the connecting-levers H H and I I and ropes or cables K K, are caused by the counter-weights M M to swing upon their pivots D D, and to instantly engage the studs F with the vertical rack, thus securely holding the elevator-car in position locked to the racks, at no matter what point in the elevator-shaft the car maybe at the time.

It will be noticed that in my construction the racks are located on the outside of the vertical beam instead of on the inside, as is usual, and that therefore the tendency of the gripping devices is to draw the racks and their supports in toward the car, thus making a more secure connection, and tending to prevent the stripping of the racks or the disposition to force 1 outward the vertical timbers, as in those constructions in which the racks are on the insides. An advantage is also secured in projecting the locking-levers through between two timbers on each side of the car, because with such construction the levers are prevented from lateral displacement and are guided positively in their movements.

The counter-weights M M are preferably guided between vertical posts or timbers V V, and have projecting from their sides, near each end, pins or studs m m, which are adapted to travel in zigzag grooves 11 o in the inner faces of the timbers V V, as shown in Fig. 5. By this arrangement the counter Weights are made not only to perform the function of throwing the gripping-levers into the racks upon the breakage of the suspending-cable, but also of operating as a regulator to check the too rapid descent of the car, and, in the event of the breakage of the cable and the failure of the gripping-levers to act, of permitting only such a moderate descent of the car (not above six or seven feet per second) as will prevent liability of accident to the occupants of the car.

The whole arrangement is very cheap, simple, and easily applied, and has been found to be a very excellent contrivance for the purpose.

I claim as my invention 1. In an elevator, the combination of the vertical timbers or guides, having racks 011 their outsides, with an elevator-car having a safety gripping contrivance adapted to engage with said outside racks and to tend to draw said racks toward the car, substantially as described.

2. In the herein-described elevator. the combination of the vertical timbers or guides, having racks on their outsides, with the car, the

levers pivoted on opposite sides of the car, and having studs for engaging the racks, and

the suspension-timber connected to the suspension-cable and adapted to hold the levers out of engagement with the racks, substantially as described. Y. i

3. The combination, With the vertical timbers or guides having racks on their outer sides, of the connecting-levers, the ropes and the counterweights, and the suspension-bar and its cable, substantially as described.

4:. The combination, with the ear and the gripping-levers mounted thereon, of the two vertical timbers or guides on each side of the car having racks on their outer faces, and between which the gripping-levers extend to engage with the racks, substantially as described.

5. The combination, with the ear, of the suspension-cable, the counter-weights having the projecting pins on their sides, and the guide-timbers for the counter-weights, having the zigzag grooves, substantially as described, for the purpose specified.

In testimony whereof I have hereunto set my hand this 17th day of July, 1883.

ERNST G. L. KUNNEOKE.

Vitnesses:

J 01m CoLLINs, SEBYL G. OBENCHAIN. 

